While house hunting in London, I came across a very good leasehold property Discussing the lease the landlady told me:

'The property was originally on a 99 years lease and two-thirds of the time passed is equal to four-fifths of the time to come. Now work it out for yourself and see how many years are to go!

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years ?

Using Only Five 5's and any mathematical operator make sum as 37

Forwards I am heavy, backward I am not. What am I?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

You can see three almost identical images below. Can you spot the odd one out from them?